One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,4)(3,7,8,6)(9,10)(11,13)(12,14)(15,16)(19,26)(20,21)(23,31)(24,30)(27,32)(28,29)(1,3,5,8)(2,6,4,7)(9,10)(11,15)(12,14)(13,16)(17,18)(19,27)(20,30)(21,24)(22,25)(23,29)(26,32)(28,31)(9,11)(10,13)(12,16)(14,15)(17,19,22,29)(18,23,25,27)(20,26,21,28)(24,32,30,31)(1,2,5,4)(3,7,8,6)(11,16)(13,15)(17,18)(19,23)(20,30)(21,24)(22,25)(26,31)(27,29)(28,32)(1,4,5,2)(3,7,8,6)(10,14)(13,15)(17,20,22,21)(18,24,25,30)(19,28,29,26)(23,31,27,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.